HTML IDs and Page Anchors
An id identifies one element on a page. Use unique id values to target an element or create a link directly to a section.
Assign a unique ID
<h2 id="contact">Contact</h2>
In CSS, target the element with a hash selector:
#contact {
scroll-margin-top: 6rem;
}
Link to a section
<a href="#contact">Go to contact information</a>
IDs should be unique within a document. If you want to style many elements the same way, use a class instead.